Improved skate



UNITED STATES- PATENT OFFICE.

LUMAN F. JOHNSON, OF BUFFALO, NEW YORK.

IMPROVED SKATE.

Specication forming part of Letters Patent No. 39, |49, dated July 7, 1863.

To a/ZZ whom. it may concern.:

Be it known that l, LUMAN F. JOHNSON, of the city of Buffalo and State of New York, have invented a new and Improved Skate; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure I is a side elevation of my improved skate. Fig. II is a bottom plan View. Fig.

, III is a section through the metallic disk which forms the fastening of the skate-runner to its wood.

fThe nature of my invention relates to the application and use of a lifting-screw between the skate-runner and its wood, so that the runner may be bent outwardly to any desired curve to form a rocker-skate. v

Letters of like name and kind refer to like parts in each of the figures.

A represents a skate-runner. This is made of nail-rod iron, which is bent into the proper shape, as shown in Fig. I, and then casehardened.77

B represents the skate-wood.

Gis a metal disk for fastening the skaterunner to the wood. It has an undercut dovetail notch made in it, into which the end of the skate-runner is fitted, as clearly shown in Fig. III. The end of the skate runner which enters the undercut dovetail notch is made correspondingly dovetailin g, so as to fit firmly therein. The disk is then let into77 the wood the thickness of the disk, and fastened by screws d, as shown in Fig. 1I.

E is a screw-nut, which is made fast to the under side of the skate-wood, near the middle thereof.

F is aliftin g screw-sliaft, the screw end of which works in the said nut.

G is a concave cap, which is placed upon the runner, and in which the oval end of the screw-shaft works. A hole, h, is made through the screw-shaft for the insertion of a pin or lever for turning it. By turning this screwshaft in the proper direction the runner may be bent outwardly to any required curve, as shown by the dotted lines i, Fig. 2, and the skate thereby quickly changed from a plain straight runner to a curved or circular runner, or rocker-skate. When the screw-shaft is turned back, the runner will, by its own spring, come back to its original position, and thus the runner may be changed from the one form to the other as often as desired. The screw-shaft braces and strengthens the runner, and will hold it firmly on any desired curve, and allows the runner to be made very light.

J is the heel-cork, the head of which rests upon the metal disk, and the point projects upwardly to enter the boot-heel.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The application and use of a lifting screw shaft, F, placed between the skate runner and wood, for the purposes and substantially as set forth.

2. The metal disk C, having an undercut dovetail notch, in combination with a runner bent at both ends and tted in said notch as a means of fastening the runner to the wood, substantially as described.

Witnesses: LUMAN F. JOHNSON.

E. B. FoRBUsH, E. OsBoRNE. 

